٨
Sensing mode
The
GD
series has two sensing modes, one is the normal sensing mode and the other is the precise sensing mode. They are automatically se-
lected by the characteristics of the object.
٨
Two-sheet threshold level shift function
In normal teaching, the two-sheet threshold level is automatically
set at the center or the one-sheet level and the two-sheet level. The
two-sheet threshold level shift function enables you to shift the two-
sheet threshold level towards, either, the one-sheet level, or, the
two-sheet level, in four steps. Consequently, if either one of the de-
tection levels is stable, then by shifting the two-sheet threshold lev-
el towards that side, stable detection is possible even if the other
detection level is unstable. Further, since by shifting the two-sheet
threshold level, the difference between it and, either, the one-sheet
level, or, the two-sheet level can be made small, fine detection is al-
so possible.
The sensing mode indicator lights up green during the normal sensing mode, but lights up yellow during the precise sensing mode.
The
GD
series goes into this mode when the num-
ber of objects (e.g., large metal sheets) is distin-
guished with relative ease.
EXPLANATION OF FUNCTIONS
6
Normal sensing
mode
The
GD
series goes into this mode when the number
of objects (e.g. lead frames) is difficult to distinguish.
In this mode, the sensitivity difference is so minute
between two sensing levels that vibration and ambi-
ent temperature changes must be carefully managed.
Precise sensing
mode
Iron etc.
Lead frame etc.
Zero-sheet level
One-sheet
threshold level
One-sheet level
Two-sheet
threshold level
Two-sheet level
Normal teaching
OUT-1 OFF
OUT-1 ON
OUT-2 OFF
OUT-2 ON
One-sheet level
1 (10%)
(0%)
(100%)
2 (20%)
3 (30%)
4 (40%)
5 (50%)
6 (60%)
7 (70%)
8 (80%)
9 (90%)
Two-sheet
threshold level
Two-sheet threshold
level indication
Two-sheet level
In normal teaching, the two-sheet
threshold level is set at 5 (50%)
Two-sheet threshold level shift function
Setting procedure
Perform normal teaching.
Select 'RUN mode' by 'SET-MODE key'.
Step
Operation
Ԙ
ԙ
Ԛ
RUN
SET
ԛ
Shift the two-sheet threshold level by pressing either 'SET-1 key' or 'SET-2 key'.
Each time 'SET-1 key' is pressed, the two-sheet threshold level shifts as '5'
ψ
'4'
ψ
'3'
ψ
'2'
ψ
'1', i.e., towards the one-sheet level.
[It becomes easier for OUT-2 (two-sheet output) to go OFF.]
Each time 'SET-2 key' is pressed, the two-sheet threshold level shifts as '5'
ψ
'6'
ψ
'7'
ψ
'8'
ψ
'9', i.e., towards the two-sheet level.
[It becomes more difficult for OUT-2 (two-sheet output) to go OFF.]
Ԝ
0-ADJ.
0-ADJ.
SET-1
SET-2
After having shifted the two-sheet threshold level, press '0-ADJ. key' till ' ' appears on the
channel display.
(The shifted two-sheet threshold level is stored and the sensor returns to the RUN mode.)
The self-diagnosis indicator turns off.
Press '0-ADJ. key' for more than 3 sec.
' ' is displayed on the channel display are the sensor en-
ters the two-sheet threshold level shift mode.
When '0-ADJ. key' is released, the ' ' display changes to
a blinking display of ' ', which is the two-sheet threshold
level before the shift.
The self-diagnosis indicator lights up in the two-sheet
threshold level shift mode.
Make sure to press '0-ADJ. key' after shifting the two-sheet threshold
level. If 'CH-SELECT key', 'SET-MODE key' or 'CH key' is pressed, al-
though the sensor returns to the RUN mode, the shifted two-sheet
threshold level is not stored.
With respect to a single teaching data, make sure to shift the two-sheet
threshold level only once. In case you wish to shift the level once again,
do so after performing the normal teaching again.
Note: Once the timer becomes effective, it acts upon both OUT-1 and
OUT-2 of all channels.
Note: In the SET mode, the self-diagnosis indicator continuously lights up
and the self-diagnosis output stays off.
٨
Timer function
The
GD
series is incorporated with a fixed delay timer of
50ms approx. Since the signal output is extended by a fixed
time interval, this is useful when the connected device has a
slow response time or when small objects are detected and
the output signal width is small.
٨
Self-diagnosis (Alarm) function
The
GD
series diagnoses itself. The result lights up the self-
diagnosis indicator, generates the self-diagnosis output, and
shows the error code on the channel display as per the fol-
lowing table
<Time chart>
Timer period: T = 50ms approx.
NORM.
mode
ON
OFF
ON
OFF
T
T
T
OFD.
mode
Sensing condition
One-sheet or more
(OUT-2; Two-sheets or more)
Under one-sheet
(OUT-2: Under two-sheets)
Operation
OUT-1, OUT-2
During RS-232C commu-
nication (
GD-C2
only)
Description
Internal circuit
failure
Countermeasures
Please contact our office.
Channel
display
Sensing lev-
el indicators
Self-diagnosis
indicator (Note)
Self-diagnosis
output (Note)
Blink
Lights up
OFF
Disconnected
sender cable
Check connection of send-
er cable.
Blink
Lights up
OFF
Operation key
pressed for 30 sec.
or more
Check keys on panel.
Blink
Lights up
OFF
Present
channel
number
Too little contrast
between one and
two sheet levels
Change the setting.
㧙
Lights up
OFF
Present
channel
number
Selection of chan-
nel without stored
data
Select the channel in
which data is stored.
㧙
Lights up
for 1 sec.
Syntax error
Blink
10 times
Lights up
ON
Memory overflow
Check if the terminal code
is correctly sent.
Blink
Lights up
ON
On power
-ON
During operation
OFF for
1 sec.
self-re-
storation
Check RS-232C protocol
baud rate, parity, stop
bits, data bits.
Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.clrwtr.com - Email: [email protected]
